Stamatios ZAMPETAKIS

Author's posts

On Monday, we had the pleasure to see one of our colleagues obtaining his PhD degree at the OAK Team. On September 21, Stamatis Zampetakis defended his PhD thesis entitled “Scalable algorithms for cloud-based Semantic Web data management”. After the defense, the attendees enjoyed the pot where Stamatis and his friends prepared several greek specialties. …

When: Thursday, March 12, at 10.30 Where: PCRI building, room 445 Who: Cristina Sirangelo, École Normale Supérieure de Cachan Title: Querying incomplete data Abstract: Data is incomplete when it contains missing/unknown information, or more generally when it is only partially available, e.g. because of restrictions on data access. Incompleteness is receiving a renewed interest as it is …

When: Friday, February 13, at 14.00 Where: PCRI building, room 445 Who: Nicoleta Preda Title: ANGIE in wonderland Abstract: In recent years, several important content providers such as Amazon, Musicbrainz, IMDb, Geonames, Google, and Twitter, have chosen to export their data through Web services. To unleash the potential of these sources for new intelligent applications, the data has to …

When: Monday, February 2, at 14.00 Where: PCRI building, room 445 Who: Paolo Papotti Title: Beyond declarative mapping and cleaning Abstract: In the “big data” era, data integration is a popular activity both in academia and in industry. Integrating hundreds of heterogeneous sources on a daily basis requires a great amount of manual work in order to have data …

We are pleased to announce the source code release of CliqueSquare, an RDF data management system based on Hadoop. CliqueSquare is a system for storing and querying large RDF graphs relying on Hadoop’s distributed file system (HDFS) and Hadoop’s MapReduce open-source implementation. It provides a novel partitioning and storage scheme that permits 1-level joins to …

When: Friday, January 16, at 14.00 Where: PCRI building, room 445 Who: Puya – Hossein Vahabi Title: Social media and Blogging Abstract: The talk will be focused on Social Media and Blogging. In particular I’ll present three different works: 1. A novel approach for as-you-type network-aware top-k keyword search over social media; 2. A novel approach to harness the …

When: Thursday, December 4, at 10.00 Where: PCRI building, room 455 Who: Y. Velegrakis Title: On building more human query answering systems Abstract: The underlying principle behind every query answering system is the existence of a query describing the information of interest. When this model is applied to non-expert users, two traditional issues become highly significant. The first is …